W1JR - FT240-43 Torriod 1:1 Balun

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Sales price: £55.00
Sales price: £55.00

FT240-43 Torriod based on the W1JR design


This form of choke is refered to as an Inline-Isolation Balun. Design is quite simple. 70cm of RG-142 high power coax coiled 8 times round a FT240-43 Torroid housed in a waterproof box and potted with Polyester resin. Termination is a chassis-mount SO-239 on opposite ends of the box.

Balun is tested with full UK power limit due to power restrictions, under perfect 1:1 SWR conditions the FT-240 can handle 1KW of power.

In-line Isolation Balun consists of

  • 10cm x 10cm x 5cm UV resistant Box
  • 1 x FT240-43 Torriod core
  • RG-142 high power Teflon Coax or similar
  • 2 x SO-239 Chassis Mounted Sockets
  • All fixing hardware stainless steel
  • Potted for 100% WX proofing
  • Feed at lowest band, E.G. 20m
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G3TXQ Hexbeams Trading as Hexbeam UK since 31st March 2013

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